121201121101220 has 24 divisors (see below), whose sum is σ = 254522595689208. Its totient is φ = 48480402464000.

The previous prime is 121201121101211. The next prime is 121201121101223. The reversal of 121201121101220 is 22101121102121.

It can be written as a sum of positive squares in 4 ways, for example, as 21166238059684 + 100034883041536 = 4600678^2 + 10001744^2 .

It is a super-3 number, since 3×121201121101220³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (121201121101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25647320 + ... + 30003120.

It is an arithmetic number, because the mean of its divisors is an integer number (10605108153717).

Almost surely, 2^{121201121101220} is an apocalyptic number.

121201121101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121201121101220 is an abundant number, since it is smaller than the sum of its proper divisors (133321474587988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121201121101220 is a wasteful number, since it uses less digits than its factorization.

121201121101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5747071 (or 5747069 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121201121101220 its reverse (22101121102121), we get a palindrome (143302242203341).

Subtracting from 121201121101220 its reverse (22101121102121), we obtain a palindrome (99099999999099).

The spelling of 121201121101220 in words is "one hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".